Mercurial > urweb
annotate tests/ascdesc.ur @ 1886:b7cd3c7c7edd
Interpret 'table' signature items more flexibly, automatically adding (Ur) constraints to support a kind of subtyping over (SQL) constraint sets
| author | Adam Chlipala <adam@chlipala.net> |
|---|---|
| date | Mon, 04 Nov 2013 15:14:23 -0500 |
| parents | 6f046b4bad24 |
| children |
| rev | line source |
|---|---|
| adam@1543 | 1 table t : { A : int } |
| adam@1543 | 2 |
| adam@1543 | 3 fun sortEm b = |
| adam@1543 | 4 queryX1 (SELECT * FROM t ORDER BY t.A {if b then sql_asc else sql_desc}) |
| adam@1543 | 5 (fn r => <xml>{[r.A]}; </xml>) |
| adam@1543 | 6 |
| adam@1543 | 7 fun main () : transaction page = return <xml><body> |
| adam@1543 | 8 <a link={sortEm True}>Ascending</a><br/> |
| adam@1543 | 9 <a link={sortEm False}>Descending</a> |
| adam@1543 | 10 </body></xml> |